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Old 07-28-2007, 11:48 AM   #21
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region: SCIC
Location: Walnut,CA
2005 05 Varis WRX
95 LS400


Alright so i got my EJ257 shortblock installed with all the original EJ20 components.
The car is untuned right now, just cobb stage 2 (EJ20)
The car has a very rough idle.
Any insight on this?
i know i definitely need a tune for the ecu to properly run the ej257
Could the rough idle cause by something else?
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Kenji815 is offline   Reply With Quote